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    <title>Document</title>
    <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
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<body>
    <div><p>内容内容</p></div>
    <input type="text"value='000'>


</body>
<script>
    console.log($("div").html());
    $("div").html("<p>123</p>");

    console.log($("div").text());
    $("div").text("<p>666</p>");

    console.log($("input").val());
    $("input").val("456");
</script>
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